How to connect a remote client master

Hello, 

At the moment, we have an Operation Center running on an AKS. It is connected to the Internet through a WAF and to some client masters running on our private network by using Ingress connection with a VPN. 

Connecting these client masters through the Internet was not possible since AKS WAF cannot open ports other than 80 or 443, and for this case 50000 port is needed.

https://docs.cloudbees.com/docs/cloudbees-ci/latest/cloud-setup-guide/configure-ports-client-master

The thing is, do we have a way to connect client masters on the internet? Is there a component we are missing here?